Change-speed gear



F. F. HAUSTG EN. CHANGE SPEED GEAR.

APPLICATION FlLED AUG.29, I919.

Patented Apr. 18, 1922.

2 SHEE TSSHEET I.

A Fig 1 F. F. HAUSTGEN.

CHANGE SPEED GEAR.

APPLICATION FILED Aus.29. 1919.

2 SHEEI'SSHEET 2- Patented Apr. 18, 1922.

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To all am it may c onceim Be it known thatI', FERNANI) FnANcols HAUs'ronN, a citizen of the Republic of France, residing at Paris. France, have in vented new and useful Improvements in Change-Speed Gears, (forwhich I have filed inF-rance applications No. 86,379, Oct. 7, 1916. and additionNo. 9861, Mar. 27, 1917, and in Italy No. 164,6()(')--76-479Feb. 14, 1918,) of which the following is' a specification. I

The object of this invention is mechanism for varying the speed of rotation of a shaft in either direction 'from zer'o to a given maximum and which will pass through all the variations of speed without any shock. The

mechanism can be applied to a shaft rotating in one direction at a constant speed and drive therefroma second shaft at difierent speeds in the opposite direction and the speed of the latter can be varied in one vdirection or the other by rotation between two predetermined limits, so as to give any speed desired between the two fixed limits. In order that the invention may be understood a drawing is annexed to. the specification merely to illustrate it.

Fig. 1 is a longitudinal sectional elevation of the mechanism.

Fig. 2 isa transverse longitudinal section on lines A-A 13-13 of Fig. 1.

Fi 3 is a horizontal section on lines C-C D of Fig. 1.

In-the drawing. 1 is engine shaft always rotating in the same direction and at a constant speed. whilst 2 is the driven shaft which is to be capable of being rotated in either direction at any speed between zero and a'fixed maximum.

The pinion 3 is keyed on the shaft 1 and gears with the wheel 4: carrying an eccentric stud 5 and connected by the connecting rod 6 to a rod 7. The rod 7 is suitably guided so that it can be pivoted about one of the ends of a lever 8.

The lever 8 is mounted in a guide 9 in which it can slide with very little friction.

The guide 9 is provided with a spindle 1t) pivoted in a projection which forms a nut mounted on a screw 12 so that it cannot rotate. The end of the lever B. opposite to the rod 7, carries a shaft 13 on which are pivoted two rods 14 and 15, the upper ends of CHANGE-SPEED GEA p Specification of LettersEatent. Patented Apr. 118, 1922. Application filed August 29, 1919. serial No. 820,728.

which are pivoted on shafts 16 and 17 carried on 164'61'818 and 19 which are pivoted on the shaft 2. I

On each of the shaftslti and 17 respectively are mounted the double pawls or ratchets 20 and 21, one or other end of which can engage with an interior toothed wheel 22. The interior toothed wheel 22 is mounted on the shaft 2 on which is keyed a pulley 23 with which it can be'connected without shock by the springs 24. i

The levers 18 and 19 have the arms 25 and 26' pivotally mounted upon them, and each arm carries a pair of springs 27.

Each of the arms 25, 26,, is provided with a toothed sector gearin with a wheel 28, the

-angular position of w ich can be varied in relation to the exterior by suitable-means. so that one or other of the ends of each of the pawls 20 and 21 can be connected through the pressure of the s rings 27 with the internal'teeth of the w eel 22.

If the parts of the mechanism are in the ositionshow'n in the drawings at each oscillation of the lever 8 the iulley 23 and consequently the shaft 2 will e turned through a certain angle in the direction shown by the arrow 29.

If the position of'the pawls 20 and 21 is reversed throu h the wheel 28. the pulley 23 will be rotate through the same angle but in the reverse'direction.

The movement will-be continued in the two cases because it, in one direction of movement of thelever 8 it is the pawl 20 of the rod 14 which operates the wheel 22, and in the op osite direction it is the pawl 21 of the ro 15 which operates the wheel .22. and by reason of the springs 24, the reciprocating movement of the lever 8 will be transformed into a rotary movement of the shaft 2.

lit the screw 12 is rotated to cause the nut 11. and the stud 10 to approach the shaft 115 the amplitude ot the angular displacement of the shaft 13 will be decreased, and the speed of rotation of the shaft 2 will be correspondingly diminished. The decrease will be progressive, and when the stud 10 is parallel with'the shaft 13, the angular displacement of the latter will be nil. and the speed of rotation of the shaft 2 will consequently be zero..

distance between the stud 10 and theshaft 13 increases In the example given, the movement of the shaft 1 is transmitted to thelever 8 through the wheel 4, which rotates at a less speed than the shaft. .It is evident however, that the relation of the diameters of the wheels 3 and 4 can be reversed and that the wheels 3 and 4 can be suppressed and the eccentric stud 5 carried directly on the engine shaft 1.

In the mechanism which has already been described, the movement of theen'gine shaft 1, which has to be transmitted at agreater or less speed and either in the same direction or in the reverse direction to the driven shaft 2, acts on the lever 8 through the gear wheel 4 -(which however may be omitted) of greater or less diameter than the wheel3 according as to whether a greater or less speed of rotation of the latter is required.

.In either .case the movement of rotation of the shaft 1, with or without a varied speed, is transmitted by the said. lever 8 through the eccentric stud 5, connecting rod 6 and sli'dingrod 7.

The invention is characterized by An internally toothed ratchet. wheel mounted for rotation, a lever mounted for oscillation, a rocking ba-r pivotally mounted at a; point intermediate its ends, on said lever, a pawlpivotally mounted on said lever and having'op'positely extending arms either of which may be engaged with the teeth of said ratchet wheel, and springs on the ends of saidrocking bar and bearing each on one of. said armsof the pawl, a second-lever mounted for oscillation, means to operate said second lever, and a rod connecting said second lever and the first named lever.

In witness whereof I aflix my signature.

FERNAND FRANCOIS HAUSTGEN. 

